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Update with inner join?

  • July 13, 2007 at 5:29 pm

    #372779

    Quick question: I have two table variables and need to perform an update on one of them based on the contents of the other. Can I perform an UPDATE operation that contains an inner join? If so, what would the syntax look like?

    Thanks.

    Regards,
    Bob Szymanski
    Blue Mule Software

  • July 13, 2007 at 8:31 pm

    #719450

    From the FROM clause down, updates with joins look pretty much like what you'd find in a SELECT...

     UPDATE t1

        SET somecol =t2.somecol

       FROM @Table1 t1,

            @Table2 t2

      WHERE t1.someothercol = t2.someothercol

    --Jeff Moden

    RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
    First step towards the paradigm shift of writing Set Based code:
    ________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.

    Change is inevitable... Change for the better is not.

    Helpful Links:
    How to post code problems
    How to Post Performance Problems
    Create a Tally Function (fnTally)

  • July 13, 2007 at 9:07 pm

    #719455

    Thanks Jeff, that's exactly what I needed.

    Regards,
    Bob Szymanski
    Blue Mule Software

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